400535431 has 4 divisors (see below), whose sum is σ = 400751152. Its totient is φ = 400319712.

The previous prime is 400535423. The next prime is 400535441. The reversal of 400535431 is 134535004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400535431 - 2³ = 400535423 is a prime.

It is a super-2 number, since 2×400535431² = 320857262972711522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400535396 and 400535405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400535441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105051 + ... + 108796.

It is an arithmetic number, because the mean of its divisors is an integer number (100187788).

Almost surely, 2^400535431 is an apocalyptic number.

400535431 is a deficient number, since it is larger than the sum of its proper divisors (215721).

400535431 is a wasteful number, since it uses less digits than its factorization.

400535431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215720.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 400535431 is about 20013.3812985212. The cubic root of 400535431 is about 737.1349105929.

The spelling of 400535431 in words is "four hundred million, five hundred thirty-five thousand, four hundred thirty-one".